1,721,239 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Thermal equilibrium states in perturbative Algebraic Quantum Field Theory in relation to Thermal Field Theory
No full textIn the first part, we analyse the properties of an interacting, massive scalar field in an equilibrium state over Minkowski spacetime. We compare the known real- and imaginary-time formalisms of Thermal Field Theory with the recent construction by Fredenhagen and Lindner of a KMS state for perturbative interacting theories in the context of perturbative Algebraic Quantum Field Theory, in the adiabatic limit. In particular, we show that the construction of Fredenhagen and Lindner reduces to the real-time formalism only if the cocycle which intertwines between the free and interacting dynamics can be neglected. Furthermore, the Fredenhagen and Lindner construction reduces to the ordinary imaginary-time formalism if one considers the expectation value of translation invariant observables. We thus conclude that a complete description of thermal equilibrium for interacting scalar fields is generally obtained only by means of the state constructed by Fredenhagen and Lindner, which combines both formalisms of Thermal Field Theory. We also discuss the properties of the expansion of the Fredenhagen and Lindner construction in terms of Feynman diagrams in the adiabatic limit. We finally provide examples showing that the real- and the imaginary-time formalisms fail to describe thermal equilibrium already at first or second order in perturbation theory. The results presented in this part are summarized in (BDP19). In the second part, we discuss the so-called secular effects, characterized by the appearance of polynomial divergences in the large time limit of truncated perturbative expansions of expectation values in Quantum Field Theory. We show that, although such effect is an artifact of perturbation theory, and thus may not be obtained via exactly solving the dynamical equation if possible, they do not represent the breakdown of perturbation theory itself. Instead, we show that the polynomial divergences follow from a bad choice of state, and we present examples of states which produce expectation values whose perturbative expansion does not present secular effects. In particular, we point that it is possible to obtain non time-divergent perturbative expressions from thermal equilibrium states for the interacting theory. This last part is based on a research project which, by the time this thesis was written, had not been concluded yet
“ESTUDIOSO”, “ILUSTRADO” ... “BACHARELAÇO”: a trajetória do magistrado Benedito de Barros e Vasconcellos
Get PDFBenedito de Barros e Vasconcellos, do Tribunal de Justiça do Estado do Maranhão, vivendo na passagem do século XIX ao XX, expõe como os intercâmbios entre política, escrita e profissões do direito foram bastante determinantes para a configuração de um “perfil legítimo” de liderança. Seus múltiplos investimentos e reconversões revelam redes de reciprocidade, por vezes frágeis e contraditórias. O alcance e permanência nas posições de poder, inclusive nos domínios do direito, são complexas e inseguras. Apresentado como “intelectual”, “desembargador” ou outras denominações, a análise de sua trajetória permite a identificação de frequências e um padrão
Linked collectors and determiners for: Herbário João de Carvalho e Vasconcellos, I.S.A./U.L..
No full textNatural history specimen data linked to collectors and determiners held within, "Herbário João de Carvalho e Vasconcellos, I.S.A./U.L.". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Herbário João de Carvalho e Vasconcellos, I.S.A./U.L..
No full textNatural history specimen data linked to collectors and determiners held within, "Herbário João de Carvalho e Vasconcellos, I.S.A./U.L.". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Herbário João de Carvalho e Vasconcellos, I.S.A./U.L..
No full textNatural history specimen data linked to collectors and determiners held within, "Herbário João de Carvalho e Vasconcellos, I.S.A./U.L.". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Herbário João de Carvalho e Vasconcellos, I.S.A./U.L..
No full textNatural history specimen data linked to collectors and determiners held within, "Herbário João de Carvalho e Vasconcellos, I.S.A./U.L.". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/835ac57e-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package
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